[Healeys] 6-36 windscreen screws

i erbs eyera3000 at gmail.com
Wed Feb 10 21:17:02 MST 2016


Thanks

Mr. Ira Erbs
Portland,OR
On Feb 10, 2016 8:16 PM, "Curtis Arndt" <cnaarndt at gmail.com> wrote:

> Ira,
>
> I believe that I ordered them years ago from Namrick in England, but I
> just checked their website and cannot find BA Screws. I just checked with
> British Tools & Fasteners and they have 4BA X 1/4" slotted screws...
>
> http://britishfasteners.com/screws/steel-screws/ba-countersunk-screws.html
>
> This is most likely where I ordered them from last.
>
> Cheers,
>
> Curt
>
> On Wed, Feb 10, 2016 at 7:29 PM, i erbs <eyera3000 at gmail.com> wrote:
>
>> Curt, Do you have source for the screws? I think that is where this
>> thread started...
>>
>> Ira Erbs
>> Portland,OR
>>       _______                                  _______
>>      (______ \____1959 BN4____/ _______)
>>          (_________________________)
>>           BT7 engine and disk brakes
>>
>> On Wed, Feb 10, 2016 at 1:52 PM, Curtis Arndt <cnaarndt at gmail.com> wrote:
>>
>>> Windscreen screws on 100s are no. 4 BA.  The six cylinder screws are NOT
>>> 2BA. AH Spares is wrong on this one.
>>>
>>> Regarding no. 2 BA and 10-32 being similar they may be about the same
>>> size but they are in NO WAY interchangeable!!!
>>>
>>> A 10-32 screw has 32 tpi and has a 60 degree pitch angle of the
>>> threads.  A no. 2 BA has 31.4 tpi and is 47 1/2 degree pitch angle of the
>>> threads.
>>>
>>> Cheers,
>>>
>>> Curt
>>> AH Concours Registry Chairman and fastener expert
>>>
>>> On Wed, Feb 10, 2016 at 1:31 PM, Ian Hey <rianhey at btinternet.com> wrote:
>>>
>>>> Hello All
>>>>
>>>>
>>>>
>>>> I have a BJ7 and have been told (by AH Spares) that the windscreen
>>>> screws are 2BA.  That is similar to No10 UNF so that is what mine now are.
>>>>
>>>>
>>>>
>>>> No 6-36 sounds as if it is very similar to 4BA which is 0.142 inch
>>>> diameter, 38.5 threads per inch.  BA (British Association) threads are
>>>> widely used for threads less than ¼ inch in all British mechanical and
>>>> electrical equipment up to the 1960s and 1970s.  They have probably died
>>>> out now in new equipment.  The largest is 0BA which has a diameter of 0.236
>>>> inch.
>>>>
>>>>
>>>>
>>>> I suspect that the windscreen screws referred to as No 6-36 are
>>>> actually 4BA
>>>>
>>>>
>>>>
>>>> Regards
>>>>
>>>>
>>>>
>>>> Ian Hey
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>
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